Intermittent thread-cutting loom temple



Sept; 2, 1930.

H. H. BURDETT INTERMITTENT THREAD CUTTING LOOI TEIIPLE Filed Oct. '7, 1929 2 Sheets-Sheet 1 InVenTr. Horace H. Burden by Wa m AT Tys.

H. H. BURDE IT IfiTIRIITTENT THREAD CUTTING L00" fmLE Sept. 2, 1930.

Filed Oct- 1929 2 Sheets-Sheet 2 Fig.3.

lnvenTor. Horace H. Burderr byMMlf ATTys.

Patented Sept. 2, 1930 1 v 1 HORACE I-I. BURDETT, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER CORPO- RATIOELOF HOPEDALE, MASSACHUSETTS, A GORPORATION 01? MAINE INTERMIT'IENT TEREAD-QUTTING LOOM TEMPLE Application filed Gcteber 7, 1929. Serial No. 39?,786.

This invention relates to a thread cutting'temple for looms of that type in which the cutting mechanism is'not in continuous "operation but operates intermittently for a predetermined time upon the occurrence of a; predetermined condition, such as filling re plenishment. The main object in having an intermittent action of thread cutting loom temple is'to save wear and tear upon the filling cutting mechanism. Such a mechanism only "calledupon to act at infrequent periods in'the loom operation. If it is in j operation continuously, it becomes worn, may become maladjusted, and thus may fail properly to perform its functions when they are required. The object of the present invention is to provide a simple and eflicient form of interanittently acting filling end cutting or parting mechanism such as is usually associated v with a temple. The object of the invention is further to provide such a mechanism so constructed that when it is in inoperative position, it will not have even a slight movement and will be out of reach of the actuating instrumentality such as the lay.

The object of the invention is further to provide such an intermittently acting filling end cutting mechanism as will have a wide field of action when in operation so as surely to sever the filling ends extending from the "selv'age.

These and other objects and features of the invention will appear more fully from the ac- 'companying description and drawings and will be particularly pointed out in the claims.

As the general location, purpose, and functiion of-the thread cutting temple and the partsof the loom associated therewith are well known and familiar to those skilled in the art, it will only be necessary here to illus trate and describe those features directly concerned with the present invention. It will also be assumed that a preferred form of the invention is shown adapted for use in automatic filling replenishing loom such as the well known Northrop loom.

In the drawings;

Fig; l is a side elevation partially in vertical Cross section of the thread flitt g 1 1 7 ployed for this purpose is temple embodying a preferred form of the invention and certain adjacent parts of the loom, the filling cutting mechanism being shown in operative position.

Fig. 2 is a view generally similar to Fig. l. with the filling cutting mechanism in inoperative position.

'1 3 is a top plan view of the temple and filling cut-ting mechanism shown in Figs. 1 and 2.

Fig. 4 is a view chiefly in transverse section taken on the line 4-4 of Fig. 3.

F 5 is a View in cross section taken on the line 5-5 of'Fig. 4:.

Fig. 6 is a view similar to Fig. 5 showing a different position of the detent cam.

In an automatic filling replenishing loom it is necessary to sever the filling ends left eX- tending from the selvage both by the substantially exhausted filling carrier and by the incoming fresh filling carrier in order to give the proper appearance to the cloth and to prevent such ends from being whipped or thrown into the shed and thus producing imperfect cloth. The filling end cutting mechanism emusually carried by or associated with the temple because the temple afforcs a. convenient means and usually the only practical means for supporting such mechanism in the required position.

In the drawings, the breast beam 1, the lay :2, and the controller shaft or starting" rod 3 may represent well known features of the Northrop automatic filling}; replenishing loom. When filling replenishment is to take place, the starter rod 3 is rocked counterclockwise to bring this mechanism into action and it is desirable, in the case of an intermittently acting filling end severing mechanism, that the operation of the filling severing mccl anism then talre place and that there be a plurality of operations for a brief period to take place to insure that the filling ends be severed.

A loom temple of an ordinary type is shown at the right-hand side of the loom. This temple comprises a box-like stand 4 secured by bolts passing through the slot 5 in the flange base 6 to a bracket 7 suitably mounted on the breast beam and a support mounted move forward and rearward in the stand. This support is in the form of an extended hollow shank 8 mounted to slide in the stand desired type.

The cutting mechanism illustrated is of the general type shown in the patent to Draper .et al., No. 1,361,839, December 14-, 1920. It comprises a main cutter blade shown as a steel insert 13 set diagonally in a shank 14 mounted and rectilinear-1y movable on the support 8 of the temple and a cooperating cutter blade 15 opened and closed upon the main blade by the movement thereof forward and rearward. The shank 14 of the main cutter blade is provided near its end with the longitudinal slots 16 and 17 by which it is mounted and guided on the studs 18 and 19 threaded into the support 8. At the rearward end the stud 19 is provided with a fibre or friction washer 20 resting against the shank 14 of the blade and with an overlying spring washer 21 so that a light friction may be imposed upon the sliding movement of the blade. The shank 14 of themain cutter blade has depending therefrom at the rearward end a heel 22 alongside the heel 10 by means of which the forward movement of the cutting mechanism is imparted thereto by the lay 2. A spring 23 is connected at its forward end to a stud 24 on the shank 14 and at its rearward end to the stud 19 and acts yieldingly to effect the rearward movement. The cooperating cutter blade 15 is pivoted at 25 on the inner face of the shank 14 of the main cutter blade and is provided with an elbow-shaped slot 26.

riding over the stud 19 so constructed that,

, when the main cutter blade is moved forward,

the blade 15 will swing to open position, as shown in Fig. 2, and, when the main cutter blade moves rearward, will swing to closed position, as shown in Fig. 1. Thus as the main cutter blade is moved forward by the lay 2 and rearward by the spring 23, the cutting mechanism is first opened and then closed upon the filling ends-extending within its field of action.

A mechanism such as thus far described would operate at each beat-up of the lay, whereas it isonly necessary that its operation shall take place upon occurrence of some predetermined condition such as filling replen ishment and then only for a briefperiod to insure the severance of the filling ends. 3 The invention provides for this by a simple and eflicientconstruction, first, by locking the filling cutting mechanism in an inoperative position, exceptwhen its operation is actually required, and, second, bylocking it in such inoperativeposition that it will not be subject even to a slight movement from the lay or other actuating element. Thus there 15 no wear and tear upon the filling cutting mechanism except that actually required to which is rigidly secured to the-support 8, has

rotarily mounted thereon a ratchet wheel 27. The hub of this ratchet wheel is spaced from the support 8 by a spacer roll 28 and a spring washer 29 and stud 18 by a ratchet spring 30 held against rotation on the stud by fittingagainst a flat er slabbed off portion 31 and having its teeth 32 cooperating with recesses 33 on the opposed face of the ratchet wheel. Thus a light friction is imposed on the ratchet wheel and reverse rotation thereof prevented. The ratchet wheel presents a series of regular teeth, the number of which will determine the number of operations of the filling cutting mechanism, and a long tooth 34'.

from the head of the Theshank14 of the main cutter blade is 1 provided with a laterally projecting lug 35 beneath the slot .16. The hub of the ratchet wheel 27 is radially extended at one side to form a detent cam 36 in vertical alignment with the lug 35. The cooperating faces 37 of the detent cam and 38 of the lug are relatively eccentric. In the specific construction illustrated to obtain this relative eccentricity,

the center of curvature of the surface 38 of the lug lies in a line passing below the axis of the stud 13 which is the centerrof curvature of the surface 37 of the detent.

The ratchet wheel 27 which moves bodily. forward and rearward with the support 8 is rotated by a pawl carried by a normally stationary, but forward and rearward movable,

arm mounted on the 100111 frame. When the predetermined condition, upon the occurrence of which the intermittent action of the filling cutting mechanism is to take place,

is that of filling replenishment, this arm 39 is conveniently secured to thestarter rod 3. Thus the arm 39 is mounted on the frame, is normally stationary, but is movable forward and backward when filling replenishment takes place. 7 I

The pawl 40 is pivotally. mounted at 41 on the arm 39 and is held in depressed position by a spring 42 forcing it against an adjnstable stud 43, both the spring and-the stud being seated in a portion 44 of the arm overhanging the pawl.

Normally the mechanism illustrated will stand as shown in fulllines in Fig. 2 and in 6. In this position the shank 14 of the main cutter blade is held in its forward position by the detent cam 36 engaging the face of the lug 35 and both cutter blades are in a position well forward of the fell. As the lay beats up, engages the heel 10 of the temple support 8 and moves this support slightly forward, the position of the parts remains unchanged because the upper face of the long tooth 34 of the ratchet wheel 27 slides under the pawl 40. When the predetermined condition occurs which is to set the filling cutting mechanism into operation and which in this case is the occurrence of filling replenislr ment, the arm 39 is moved forward or into the position shown in dotted lines in Fig. 2,

carrying the pawl forward, swinging it slightly upward, and then allowing it to drop in front of the long tooth 34-. Then upon the rearward movement of the arm 39, the pawl catching in front of the long tooth 34; gives a substantial angular movement to the ratchet wheel sufiicientiy to swing the detent cam 36 out of the path of the lug 35, thus allowing the spring 23 immediately to project the filling cutting mechanism rearward into operative position. Thereafter upon each beat-up of the lay, the filling cutting mechanism is operated in the usual manner to open and close upon the filling ends extending from the filling. But as each beat-up takes place, the lay engaging the heel 10 moves the support 8 slightly forward and the ratchet wheel 27 cooperating with the pawl 40 is rotated step by step. This continues, depending upon the number of teeth in the ratchet'wheel. until the detent cam 36 again comes into a position where it begins to contact with the face ofthe lug 35. Thereupon the filling cutting mechanism is held in forward inoperative position. Owing to the relative eccentricity of the faces 3'? of the detent cam and 88 of the lug, the final movement of the detent cam before the long tooth 34 comes into position to meet the pawl 40 cams the shank 14 slightly forward relatively to the support 8 to bring the depending heel 22 slightly forward of the depending heel and is as shown in Fig. 2. The advantage of this is that in the many beat-ups of the lay which take place between the required operations of the filling cutting mechanism, the lay which is the actuating means for the filling cutting mechanism can not engage the heel 22 and so no movement whatever of the filling cutting mechanism takes place and it is saved entirely from unnecessary wear and tear.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

1. In a loom, a temple stand mounted on the frame, a temple support mounted in the stand and movable forward by the lay, a spring acting to move the temple support rearward, main cutter blade having a shank mounted and rectilinearly movable on the temple support forward by the lay and rearward by a spring, a lug on the shank, a cooperating cutter blade opened and closed upon the main blade by the movement thereof forward and rearward, a ratchet wheel rotarily mounted on the temple support having a long tooth and a detent cam cooperatin with the lug, a normally stationary forward and rearward movable arm mounted on the frame, a pawl pivoted on the arm and overlying and cooperating with the ratchet wheel to rotate the ratchet wheel step by step upon each' lay-induced forward movement of the temple support until the long tooth comes beneaththe pawl and the detent engages the lug to lock the main cutter blade in forward open position, and the said arm acting When thereafter moved forward and then rearward first to drop the pawl in front of the long tooth and then to cause the pawl to engage the long tooth and rotate the ratchet wheel sufficiently to unlock the detent cam from the lug and permit the main cutter blade to move rearward to closed position.

2. In a loom, the construction defined in claim 1,'in which both the temple and the main cutter blade are provided with dependingheels in the path of the lay for effecting their forward movements from the lay, and in which the detent cam when in looking engagement with the lugmaintains the cutter heel forward of thetemple heel so as not to be struck by the lay when the cutter blades are inoperative.

8. In a loom, a support mounted on the frame yieldingly movable rearward and movable forward by the lay, fillin g cutting mecha nism movably mounted upon the support to open and close upon filling ends extending from the selvage, a ratchet wheel rotarily mounted on the support having a long tooth and a detent cooperating with the cutting mechanism, a normally stationary forward and rearward movable arm mounted on the frame a )awl pivot-ed on the arm and overl mg and cooperating with the ratchet wheel to rotate the ratchet wheel step by step upon each-lay-induced forward movement of the support until the long tooth comes beneath the pawl and the detent locks the cutting mechanism in an inoperative position, and the said arm acting when thereafter moved forward and then rearward first to drop the pawl in front of the long tooth and then to cause the pawl to engage the long tooth and rotate the ratchet wheel sufficiently to unlock the detent cam from the cutting mechanism and free the cutting mechanism to operative position.

4. In a loom, the construction defined in claim 3, in which both the support and the cutting mechanism are provided with depending heels in the path of the lay for effecting respectively the forward movement of the support and the closing movement of the cutting mechanism and in which the delit) tent when holding the cutting mechanism in inoperative position maintains the heel of the cutting mechanism forwardly of the heel of the support so as not to be struck by the lay when the cutting mechanism is in inoperative position;

5. In a loom, the construction defined in claim 1, in which both the temple and the main cutter blade are provided with depending heels in the path of the lay for effecting their forward movements from the lay, and in which the detent cam and lug have relatively eccentric cooperating faces acting to move the main cutter blade slightly forward with respect to the temple and, when in looking position, tomaintain the cutter heel forward of the temple heel so as not to be struck by the lay.

. In a loom, a support mounted on the 'frame yieldingly movable rearward and movable forward by the lay, filling cutting rmeohanism bodily movable forward by the lay and yieldingly movable rearward to open and close upon filling ends extending from the selvage, a ratchet wheel rotarily mounted on the support having a detent cooperating with thecuttingmechanism, means cooperating with the ratchet wheel acting to rotate the ratchet wheel step by step upon each of a predetermined series of lay-induced forward bodily movements of thesupport and ratchet wheel to bringthe detent into position to lock the cutting mechanism in forward inoperative position andthereafter acting upon the occurrence of a predetermined condition to rotate the ratchet wheel sufficiently to bring the detent into position to release the cutting j mechanism to operative position.

7. In a loom, the construction defined 1n claim 6, in which both the support and the cutting .mechanism are provided with de pending'heels in the path of the lay for ef- 1 fecting their forward movements from the lay, and in which the detent and the portion of the cutting mechanism cooperating therewith have relatively eccentric cooperating faces acting to move the cutting mechanism 'slightlyforward with respect to the support and, when in looking position, to

maintain the heel of the cutting mechanism forward of the heel of the support so as not [to be struck by the lay. I p In testimony whereof, I have signed my name to this specification.

notation H. BURDETT. 

